Insects Injurious to the Apple. 



103 



REFERENCES. 



(1) Stainton, H. T. ' Natural History of the Tineina,' vol. I., pp. 208-214. 



PI. v., Fig 3 (1855). 



(2) Theobald, F. V. Report on Economic Zoology for the year ending 



April 1st, 1907, p. 28 (1907). 



THE APPLE LEAF-BLISTER MOTH. 



(Ornix petiolella. Sta.) 



Amongst several specimens of apple leaves sent during the year 

 1907 damaged by mining larvaj, some were found to be attacked 

 by the little Tineid known as Ornix petiolella. The mine formed by 

 this species is a rough blotch, like that of the nut species (Fig. 201), 



FIG. 89. Ornix petiolella. 



[Horace Kniijlit. 



and is on the upper surface of the leaf. The larva found in these 

 blisters is greyish-green to olive green in colour, the third to tenth 

 segments have six pale spots, four in a row in front and two behind ; 

 from these arise short stiff hairs. In length, the larvse may reach 

 7 5 mm. They are found in June and again in September. When 

 mature the larva leaves the blister and spins the two sides of the 

 leaf together, which forms a nest over ^ inch in length (Stainton 

 (2) says an inch) ; within this the larva, which finally assumes an 

 orange-yellow hue, spins a dull yellowish cocoon. 



The moth first appears in May. Its wing expanse is from 10 

 to 12 mm. The front wings are deep brownish-grey ; on the costa 

 are seven or eight white patches, and on the inner edge, also are 

 some whitish markings ; the fringe has two external thin black lines 

 from the costa to the anal angle. Posterior wings grey with long 



